Is it wise to train a husband and wife at the same time?

To me, it seems like a better idea to train them separately. The primary thing is probably avoiding the various awkward remarks that the male and female would say to each other. You want the focus to be between the trainer and the trainee versus one trainee interacting with the other trainee.

My primary concern is to make sure that the couple actually like each other - you want to avoid being brought into the middle of fights, or a divorce (which I've heard of some personal trainers struggling to navigate through when training couples). I exercise patients in a group setting and I emphasize to all of my patients that everyone needs to put their blinders on and focus on what their abilities are and not compare themselves to other people which tends to cut down on the comparisons and the "why is he doing that and I'm not" questions (although for some, especially those with egos, it's harder than for others). Perhaps maybe have one fit in their cardiovascular exercise while working with the other on weights and then switch?

As a Personal trainer , I would recommend training them separately. men and women hold fat in diferent areas of the body , and this requires different excersises to target. also men having higher test levels, they can usually lift heavier weight then women and need to be pushed to make required gains in muscle size.